Technician A states that about 33% of the heat energy created is wasted by being dumped straight out of the exhaust to the atmosphere. Technician B states that 33% is wasted by internal friction and from
radiating off hot engine components straight to the atmosphere. Who is correct?
Select one:
A. Technician A
B. Technician B
C. Both A and B
D. Neither Anor B

Afan that can provide air speeds up to 60 m/s is to be used in a low-speed wind tunnel with atmospheric air at 35 c. if one wishes to use the wind tunnel to study flat-plate boundary layer behavior up to reynolds numbes of re 10, what is the minimum plate length that should be used? at what distance from the leading edge would transition occur if the critical reynolds nurnber were rer,e = 5 × 105?